IL86743A - Reflectometric moisture meter for capillary-porous materials,especially for the soil - Google Patents
Reflectometric moisture meter for capillary-porous materials,especially for the soilInfo
- Publication number
- IL86743A IL86743A IL86743A IL8674388A IL86743A IL 86743 A IL86743 A IL 86743A IL 86743 A IL86743 A IL 86743A IL 8674388 A IL8674388 A IL 8674388A IL 86743 A IL86743 A IL 86743A
- Authority
- IL
- Israel
- Prior art keywords
- probe
- measuring device
- capillary
- soil
- dielectric constant
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
- G01N33/246—Earth materials for water content
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N22/00—Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more
- G01N22/04—Investigating moisture content
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Pathology (AREA)
- Immunology (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Electromagnetism (AREA)
- Environmental & Geological Engineering (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Sampling And Sample Adjustment (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Paper (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The probe (1) of the measuring device, fed with the needle electric pulse, is constituted of a set of waveguides connected parallely in the embranchment (2) with the microprocessor controller (10) of the electronic assemblies of the measuring device. Waveguides of the probe are installed in chosen layers of the material studied. The directly measured quantity is the sequence of time periods separating subsequent reflections of the electromagnetic wave propagating in the probe from the particular probe impedance discontinuities. The electromagnetic wave propagation velocity in a chosen layer of the medium is calculated on this basis, and therefrom the dielectric constant of the medium, and finally its moisture content upon which the dielectric constant depends. The measuring device according to this invention may be used either for measuring or as an element of a control system, for all the capillary-porous media to which the probe can be inserted, such as: the soil, agricultural products (grain, hop cones, tobacco, hay), semiproducts and final products of the food processing industry (flour, bakery products), wood, moulding sand, subgrades, building foundations etc.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL26661787A PL154440B1 (en) | 1987-07-03 | 1987-07-03 | Reflectometric humidity measuring instrument for measuring humidities of porous capillary bodies in particular of soil |
PL26661687A PL156883B1 (en) | 1987-07-03 | 1987-07-03 | Multisensor tester for reflectometric humidity measuremets in particular for measuring humidity of soil |
PL27212888A PL156952B3 (en) | 1988-04-28 | 1988-04-28 | Reflectometric measuring instrument of the humidity of capillary porous bodies in particular of the soil |
Publications (2)
Publication Number | Publication Date |
---|---|
IL86743A0 IL86743A0 (en) | 1988-11-30 |
IL86743A true IL86743A (en) | 1992-05-25 |
Family
ID=27354065
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IL86743A IL86743A (en) | 1987-07-03 | 1988-06-15 | Reflectometric moisture meter for capillary-porous materials,especially for the soil |
Country Status (10)
Country | Link |
---|---|
US (1) | US4918375A (en) |
EP (1) | EP0297604B1 (en) |
AT (1) | ATE83322T1 (en) |
BG (1) | BG48818A3 (en) |
CS (1) | CS270000B2 (en) |
DD (1) | DD271380A5 (en) |
DE (1) | DE3876517T2 (en) |
FI (1) | FI91329C (en) |
HU (1) | HU205666B (en) |
IL (1) | IL86743A (en) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5376888A (en) * | 1993-06-09 | 1994-12-27 | Hook; William R. | Timing markers in time domain reflectometry systems |
US5729787A (en) * | 1996-07-23 | 1998-03-17 | Eastman Kodak Company | Toner concentration monitor and method |
US5920195A (en) * | 1996-12-18 | 1999-07-06 | The United States Of America As Represented By The Secretary Of Agriculture | Apparatus and method for the measurement of forest duff moisture content |
US6281801B1 (en) * | 1997-06-04 | 2001-08-28 | Bechtel Bwxt Idaho, Llc | System and method for monitoring water content or other dielectric influences in a medium |
US6441622B1 (en) | 2000-08-18 | 2002-08-27 | Motorola, Inc. | Method and apparatus for time domain reflectometry moisture sensing in various media |
FI109651B (en) * | 2001-03-23 | 2002-09-30 | Delfin Technologies Ltd | Procedure for measuring edema in tissues |
US6632534B2 (en) * | 2001-08-30 | 2003-10-14 | Soilmoisture Equipment Corp. | Encased time domain reflectometry probe |
US6978794B2 (en) * | 2002-05-22 | 2005-12-27 | University Of Florida Research Foundation, Inc. | Automatic control method and system for irrigation |
US7228900B2 (en) * | 2004-06-15 | 2007-06-12 | Halliburton Energy Services, Inc. | System and method for determining downhole conditions |
CA2486562A1 (en) * | 2004-11-26 | 2006-05-26 | Moustafa Mohamed | Apparatus for determining the electric properties of a sample |
US7836910B2 (en) | 2004-12-29 | 2010-11-23 | Rain Bird Corporation | Soil moisture sensor and controller |
CN101216439B (en) * | 2008-01-18 | 2012-01-11 | 中国农业大学 | Soil moisture measurement unit and method |
US8751052B1 (en) * | 2010-02-01 | 2014-06-10 | Green Badge, LLC | Automatic efficient irrigation threshold setting |
WO2011156671A1 (en) | 2010-06-10 | 2011-12-15 | Clearcount Medical Solutions, Inc. | Method and apparatus for automating the counting of sharps using rfid tags |
US9128494B2 (en) | 2011-11-17 | 2015-09-08 | Microsemi Corporation | Apparatus and method for assessing volumetric moisture content and controlling an irrigator |
US9481777B2 (en) | 2012-03-30 | 2016-11-01 | The Procter & Gamble Company | Method of dewatering in a continuous high internal phase emulsion foam forming process |
CN103743701B (en) * | 2013-12-13 | 2016-01-20 | 云南中烟再造烟叶有限责任公司 | A kind of method detecting papermaking-method reconstituted tobaccos coating weight |
US9909987B1 (en) * | 2014-07-30 | 2018-03-06 | Transcend Engineering and Technology, LLC | Systems, methods, and software for determining spatially variable distributions of the dielectric properties of a material |
US9970969B1 (en) * | 2014-08-26 | 2018-05-15 | Transcend Engineering and Technology, LLC | Systems, methods, and software for determining spatially variable distributions of the dielectric properties of a heterogeneous material |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1100050B (en) * | 1978-10-31 | 1985-09-28 | Cise Spa | INSTRUMENT FOR MEASURING HUMIDITY IN MATERIALS, PARTICULARLY SUITABLE FOR MEASURING LANDS AND SANDS |
US4396062A (en) * | 1980-10-06 | 1983-08-02 | University Of Utah Research Foundation | Apparatus and method for time-domain tracking of high-speed chemical reactions |
SU1337746A1 (en) * | 1984-05-29 | 1987-09-15 | Всесоюзный Научно-Исследовательский И Проектный Институт Промышленности Асбестоцементных Изделий | Moisture meter |
-
1988
- 1988-06-15 IL IL86743A patent/IL86743A/en unknown
- 1988-06-21 US US07/210,662 patent/US4918375A/en not_active Expired - Fee Related
- 1988-06-28 CS CS884552A patent/CS270000B2/en unknown
- 1988-07-01 DD DD31746088A patent/DD271380A5/en not_active IP Right Cessation
- 1988-07-01 EP EP88110563A patent/EP0297604B1/en not_active Expired - Lifetime
- 1988-07-01 DE DE8888110563T patent/DE3876517T2/en not_active Expired - Fee Related
- 1988-07-01 FI FI883165A patent/FI91329C/en not_active IP Right Cessation
- 1988-07-01 BG BG84725A patent/BG48818A3/en unknown
- 1988-07-01 AT AT88110563T patent/ATE83322T1/en not_active IP Right Cessation
- 1988-07-04 HU HU883480A patent/HU205666B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
HU205666B (en) | 1992-05-28 |
CS455288A2 (en) | 1989-09-12 |
EP0297604B1 (en) | 1992-12-09 |
DE3876517T2 (en) | 1993-05-06 |
ATE83322T1 (en) | 1992-12-15 |
HUT48372A (en) | 1989-05-29 |
CS270000B2 (en) | 1990-05-14 |
BG48818A3 (en) | 1991-05-15 |
FI883165A0 (en) | 1988-07-01 |
US4918375A (en) | 1990-04-17 |
FI883165A (en) | 1989-01-04 |
FI91329C (en) | 1994-06-10 |
EP0297604A3 (en) | 1990-05-09 |
EP0297604A2 (en) | 1989-01-04 |
DD271380A5 (en) | 1989-08-30 |
IL86743A0 (en) | 1988-11-30 |
DE3876517D1 (en) | 1993-01-21 |
FI91329B (en) | 1994-02-28 |
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